From 9fa784be9c9af9026a7e635b0f029612ae04bda9 Mon Sep 17 00:00:00 2001 From: Blake Embrey Date: Mon, 26 Jan 2026 14:10:50 -0800 Subject: [PATCH] Benchmark value slice, update function --- benchmarks/value-slice.bench.ts | 211 +++++++++++ package-lock.json | 604 +++++++++++++++++++++++++++++++- package.json | 11 +- src/index.ts | 5 +- src/parse-cookie.spec.ts | 1 + 5 files changed, 826 insertions(+), 6 deletions(-) create mode 100644 benchmarks/value-slice.bench.ts diff --git a/benchmarks/value-slice.bench.ts b/benchmarks/value-slice.bench.ts new file mode 100644 index 0000000..ecf2c5b --- /dev/null +++ b/benchmarks/value-slice.bench.ts @@ -0,0 +1,211 @@ +import { describe, bench, it, expect } from "vitest"; + +const CASES = [ + { + text: "test=example", + start: 5, + end: 12, + expected: "example", + }, + { + text: "test=", + start: 5, + end: 5, + expected: "", + }, + { + text: "test= example ", + start: 5, + end: 14, + expected: "example", + }, + { + text: "test=example ", + start: 5, + end: 13, + expected: "example", + }, + { + text: "test= example", + start: 5, + end: 13, + expected: "example", + }, + { + text: "test= \t ", + start: 5, + end: 8, + expected: "", + }, +]; + +function valueSliceDoThenWhile(str: string, min: number, max: number) { + let start = min; + let end = max; + + do { + const code = str.charCodeAt(start); + if (code !== 32 /* */ && code !== 9 /* \t */) break; + } while (++start < end); + + while (end > start) { + const code = str.charCodeAt(end - 1); + if (code !== 32 /* */ && code !== 9 /* \t */) break; + end--; + } + + return str.slice(start, end); +} + +function valueSliceDoThenWhileEmptyString( + str: string, + min: number, + max: number, +) { + let start = min; + let end = max; + + do { + const code = str.charCodeAt(start); + if (code !== 32 /* */ && code !== 9 /* \t */) break; + } while (++start < end); + + while (end > start) { + const code = str.charCodeAt(end - 1); + if (code !== 32 /* */ && code !== 9 /* \t */) break; + end--; + } + + return start === end ? "" : str.slice(start, end); +} + +function valueSliceDoThenWhileExitEarly(str: string, min: number, max: number) { + if (min === max) return ""; + let start = min; + let end = max; + + do { + const code = str.charCodeAt(start); + if (code !== 32 /* */ && code !== 9 /* \t */) break; + } while (++start < end); + + while (end > start) { + const code = str.charCodeAt(end - 1); + if (code !== 32 /* */ && code !== 9 /* \t */) break; + end--; + } + + return str.slice(start, end); +} + +function valueSliceTwoWhile(str: string, min: number, max: number) { + let start = min; + let end = max; + + while (start < end) { + const code = str.charCodeAt(start); + if (code !== 32 /* */ && code !== 9 /* \t */) break; + start++; + } + + while (end > start) { + const code = str.charCodeAt(end - 1); + if (code !== 32 /* */ && code !== 9 /* \t */) break; + end--; + } + + return str.slice(start, end); +} + +function valueSliceTwoWhileExitEarly(str: string, min: number, max: number) { + if (min === max) return ""; + let start = min; + let end = max; + + while (start < end) { + const code = str.charCodeAt(start); + if (code !== 32 /* */ && code !== 9 /* \t */) break; + start++; + } + + while (end > start) { + const code = str.charCodeAt(end - 1); + if (code !== 32 /* */ && code !== 9 /* \t */) break; + end--; + } + + return str.slice(start, end); +} + +function valueSliceTwoDoWhile(str: string, min: number, max: number) { + let start = min; + let end = max; + + do { + const code = str.charCodeAt(start); + if (code !== 32 /* */ && code !== 9 /* \t */) break; + } while (++start < end); + + do { + const code = str.charCodeAt(end - 1); + if (code !== 32 /* */ && code !== 9 /* \t */) break; + } while (--end > start); + + return str.slice(start, end); +} + +function valueSliceTwoDoWhileExitEarly(str: string, min: number, max: number) { + if (min === max) return ""; + let start = min; + let end = max; + + do { + const code = str.charCodeAt(start); + if (code !== 32 /* */ && code !== 9 /* \t */) break; + } while (++start < end); + + do { + const code = str.charCodeAt(end - 1); + if (code !== 32 /* */ && code !== 9 /* \t */) break; + } while (--end > start); + + return str.slice(start, end); +} + +function valueSliceThenTrim(str: string, min: number, max: number) { + return str.slice(min, max).trim(); +} + +describe.each(CASES)("valueSlice $text", ({ text, start, end, expected }) => { + bench("two while", () => { + valueSliceTwoWhile(text, start, end); + }); + + bench("two while (exit early)", () => { + valueSliceTwoWhileExitEarly(text, start, end); + }); + + bench("two do...while", () => { + valueSliceTwoDoWhile(text, start, end); + }); + + bench("two do...while (exit early)", () => { + valueSliceTwoDoWhileExitEarly(text, start, end); + }); + + bench("do...while then while", () => { + valueSliceDoThenWhile(text, start, end); + }); + + bench("do...while then while (exit early)", () => { + valueSliceDoThenWhileExitEarly(text, start, end); + }); + + bench("do...while then while (empty string check)", () => { + valueSliceDoThenWhileEmptyString(text, start, end); + }); + + bench("slice then trim", () => { + valueSliceThenTrim(text, start, end); + }); +}); diff --git a/package-lock.json b/package-lock.json index 86188b5..991f5ba 100644 --- a/package-lock.json +++ b/package-lock.json @@ -10,7 +10,9 @@ "license": "MIT", "devDependencies": { "@borderless/ts-scripts": "^0.15.0", + "@size-limit/preset-small-lib": "^12.0.0", "@vitest/coverage-v8": "^3.2.4", + "size-limit": "^12.0.0", "top-sites": "1.1.194", "typescript": "^5.6.2", "vitest": "^3.2.4" @@ -1298,6 +1300,554 @@ "url": "https://github.com/sindresorhus/is?sponsor=1" } }, + "node_modules/@size-limit/esbuild": { + "version": "12.0.0", + "resolved": "https://registry.npmjs.org/@size-limit/esbuild/-/esbuild-12.0.0.tgz", + "integrity": "sha512-r9i+HrtunIu7wAPtqD3t4DqfYin3kxPoMAv8cidkzlCS69IYCe3EG2UbQa10AdvQyaHTEK+MPkr9ifUd3W29og==", + "dev": true, + "license": "MIT", + "dependencies": { + "esbuild": "^0.27.0", + 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@@ "node": ">=8" } }, + "node_modules/bytes-iec": { + "version": "3.1.1", + "resolved": "https://registry.npmjs.org/bytes-iec/-/bytes-iec-3.1.1.tgz", + "integrity": "sha512-fey6+4jDK7TFtFg/klGSvNKJctyU7n2aQdnM+CO0ruLPbqqMOM8Tio0Pc+deqUeVKX1tL5DQep1zQ7+37aTAsA==", + "dev": true, + "license": "MIT", + "engines": { + "node": ">= 0.8" + } + }, "node_modules/cac": { "version": "6.7.14", "resolved": "https://registry.npmjs.org/cac/-/cac-6.7.14.tgz", @@ -2931,9 +3491,9 @@ } }, "node_modules/lilconfig": { - "version": "3.1.2", - "resolved": "https://registry.npmjs.org/lilconfig/-/lilconfig-3.1.2.tgz", - "integrity": "sha512-eop+wDAvpItUys0FWkHIKeC9ybYrTGbU41U5K7+bttZZeohvnY7M9dZ5kB21GNWiFT2q1OoPTvncPCgSOVO5ow==", + "version": "3.1.3", + "resolved": "https://registry.npmjs.org/lilconfig/-/lilconfig-3.1.3.tgz", + "integrity": "sha512-/vlFKAoH5Cgt3Ie+JLhRbwOsCQePABiU3tJ1egGvyQ+33R/vcwM2Zl2QR/LzjsBeItPt3oSVXapn+m4nQDvpzw==", "dev": true, "license": "MIT", "engines": { @@ -3403,6 +3963,16 @@ "node": "^10 || ^12 || ^13.7 || ^14 || >=15.0.1" } }, + "node_modules/nanospinner": { + "version": "1.2.2", + "resolved": "https://registry.npmjs.org/nanospinner/-/nanospinner-1.2.2.tgz", + "integrity": "sha512-Zt/AmG6qRU3e+WnzGGLuMCEAO/dAu45stNbHY223tUxldaDAeE+FxSPsd9Q+j+paejmm0ZbrNVs5Sraqy3dRxA==", + "dev": true, + "license": "MIT", + "dependencies": { + "picocolors": "^1.1.1" + } + }, "node_modules/normalize-url": { "version": "6.1.0", "resolved": "https://registry.npmjs.org/normalize-url/-/normalize-url-6.1.0.tgz", @@ -4101,6 +4671,34 @@ "dev": true, "license": "ISC" }, + "node_modules/size-limit": { + "version": "12.0.0", + "resolved": "https://registry.npmjs.org/size-limit/-/size-limit-12.0.0.tgz", + "integrity": "sha512-JBG8dioIs0m2kHOhs9jD6E/tZKD08vmbf2bfqj/rJyNWqJxk/ZcakixjhYtsqdbi+AKVbfPkt3g2RRZiKaizYA==", + "dev": true, + "license": "MIT", + "dependencies": { + "bytes-iec": "^3.1.1", + "lilconfig": "^3.1.3", + "nanospinner": "^1.2.2", + "picocolors": "^1.1.1", + "tinyglobby": "^0.2.15" + }, + "bin": { + "size-limit": "bin.js" + }, + "engines": { + "node": "^20.0.0 || ^22.0.0 || >=24.0.0" + }, + "peerDependencies": { + "jiti": "^2.0.0" + }, + "peerDependenciesMeta": { + "jiti": { + "optional": true + } + } + }, "node_modules/slash": { "version": "4.0.0", "resolved": "https://registry.npmjs.org/slash/-/slash-4.0.0.tgz", diff --git a/package.json b/package.json index e73d593..d98da37 100644 --- a/package.json +++ b/package.json @@ -28,12 +28,15 @@ "format": "ts-scripts format", "prepare": "ts-scripts install", "prepublishOnly": "npm run build", + "size": "size-limit", "specs": "ts-scripts specs", - "test": "ts-scripts test" + "test": "ts-scripts test && npm run size" }, "devDependencies": { "@borderless/ts-scripts": "^0.15.0", + "@size-limit/preset-small-lib": "^12.0.0", "@vitest/coverage-v8": "^3.2.4", + "size-limit": "^12.0.0", "top-sites": "1.1.194", "typescript": "^5.6.2", "vitest": "^3.2.4" @@ -41,6 +44,12 @@ "engines": { "node": ">=18" }, + "size-limit": [ + { + "path": "dist/index.js", + "limit": "1.5 KB" + } + ], "ts-scripts": { "project": "tsconfig.build.json" } diff --git a/src/index.ts b/src/index.ts index 30fd59a..ddc9f17 100644 --- a/src/index.ts +++ b/src/index.ts @@ -500,17 +500,18 @@ function eqIndex(str: string, min: number, max: number) { * Slice out a value between startPod to max. */ function valueSlice(str: string, min: number, max: number) { + if (min === max) return ""; let start = min; let end = max; do { const code = str.charCodeAt(start); - if (code !== 0x20 /* */ && code !== 0x09 /* \t */) break; + if (code !== 32 /* */ && code !== 9 /* \t */) break; } while (++start < end); while (end > start) { const code = str.charCodeAt(end - 1); - if (code !== 0x20 /* */ && code !== 0x09 /* \t */) break; + if (code !== 32 /* */ && code !== 9 /* \t */) break; end--; } diff --git a/src/parse-cookie.spec.ts b/src/parse-cookie.spec.ts index 7da7acd..2444909 100644 --- a/src/parse-cookie.spec.ts +++ b/src/parse-cookie.spec.ts @@ -29,6 +29,7 @@ describe("cookie.parseCookie", function () { it("should return empty object", function () { expect(cookie.parseCookie("")).toEqual({}); + expect(cookie.parseCookie(" \t ")).toEqual({}); }); it("should parse cookie with empty value", function () {